DOCUMENT:Q69027 06-NOV-1999 [win16sdk] TITLE :Handling Critical Errors in Windows-Based Application PRODUCT :Microsoft Windows Software Development Kit PROD/VER:WINDOWS:3.0,3.1 OPER/SYS: KEYWORDS:_IK ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows Software Development Kit (SDK) versions 3.0, 3.1 ------------------------------------------------------------------------------- SUMMARY ======= The Windows SetErrorMode() function controls whether Windows handles MS-DOS Function 24H errors or allows the calling application to handle them. Listed below is an example of an MS-DOS Function 24H error and Windows's method for handling the error: if an application attempts to access drive A and there is no disk in that drive, Windows displays the System Error message box "Cannot read from drive A: (Cancel) (Retry)." Calling SetErrorMode() allows the application to handle these messages rather than defaulting to the System Error message box. The following code fragment demonstrates this process: SetErrorMode(1); // Allow application to handle system error ... /* If error occurs, handle it appropriately. */ ... SetErrorMode(0); // Windows will display the standard // INT 24H error message box for any other // System Errors. Additional query words: ====================================================================== Keywords : _IK Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK300 kbWinSDK310 Version : WINDOWS:3.0,3.1 Issue type : kbhowto ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 1999.